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The Edelbrock Victor 18° two‑piece spider base is the valley plate portion intended for conventional 18‑degree small‑block Chevy heads on standard deck engines. It’s compatible with older 18° Victor intakes and helps reduce required fitting work for those castings; use a Fel‑Pro NASCAR gasket for the base as recommended for proper installation.
Edelbrock 2993 18 2-Piece Manifold Base
